As per your earlier request we should not pay any amount above $ 500.

[PRD2021]

1. As per your earlier request we should not pay any amount above $ 500.
2. You have requested earlier that we not to pay any amount above $ 500.

Would please tell me which one is grammatically correct?

 

[Barque]

The first is grammatical but still doesn't sound correctly worded. The second isn't grammatical.

But I can't understand what you mean without context. What's the background?

(It's not enough for a sentence to be grammatical. It also has to be worded in a natural or normal way.)

 

[tedmc]

You have earlier requested us not to pay any amount above $500.

 

[PRD2021]

The first is grammatical but still doesn't sound correctly worded. The second isn't grammatical.

But I can't understand what you mean without context. What's the background?

(It's not enough for a sentence to be grammatical. It also has to be worded in a natural or normal way.)

He had earlier requested that we should not pay any amount above $500. He is now requesting us to pay the amount which is exceeding above $500, so we have to remind him that we have a standing request.

 

[Barque]

He had earlier requested that we should not pay any amount above $500. He is now requesting us to pay the amount which is exceeding above $500,

When I asked for context, I meant:
1. What's the relationship between the speaker and the other person?
2. What's the payment for?

Anyway, you could try:
You had asked us earlier not to pay any amount higher than $500.
You had asked us earlier not to pay more than $500 at any one time.

"Request" needs a specific construction, ideally, though it's often used the same way as "ask".

 

[Tarheel]

He is now asking you to pay amounts that exceed $500, but you don't want to do that. Why? Because of his previous instructions. (Isn't he allowed to change his mind?)

 

[Rover_KE]

Not without giving notice rescinding his earlier request.